503 Lapstrake Inboard Launch

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  • Vessel Specifications and Comments

    • LOA: 5.03m
    • LWL:
    • Beam: 1.8m
    • Draft loaded: .45m
    • Hull Weight with engine and all equipment(no fuel): 400kg
    • Power: 6kw
    • Speed: approximately 6.5 knots cruising
    • Construction:marine grade mahogany lapstrake plywood. The hull will be planked upside down on a building jig consisting of temporary molds and the vessel’s stem, keel, and transom.  When planking is complete the hull will be lifted off this jig and turned upright to receive interior framing, engine, seating, and trim for completion.

  • About the Plans

    • Construction Method and Materials:

      Glued frameless lapstrake plywood construction.

    • Number and Type of Drawings:

      Full size mold plots, General construction, Construction details, Tank and Machinery, Rudder

    • Price:

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From the Plans: Construction Sequence

 

General: The hull will be planked upside down on a building jig consisting of temporary molds and the vessel’s stem, keel, and transom.  When planking is complete the hull will be lifted off this jig and turned upright to receive interior framing, engine, seating, and trim for completion.  

It is to be stressed that fairing, lining off planking, and proportions of the various parts that make up this vessel must be done by a practiced eye.  The success of this product depends on detailed hand work. Guidance is to be sought from the designer in all such questions.  

All materials to be highest quality available.  All plywood used to be marine grade mahogany of grade equal to BS 1088 standard.  All joints in structural members including plywood planking to be minimum 8:1 scarf.  All surfaces and edges of every part are to be well coated (minimum 2 coats) with epoxy resin correctly formulated for the task.  All joining and laminating to be done with epoxy resin as per book, The Gougeon Brothers on Boat Construction.  All fastenings exposed to seawater are to be copper or bronze.  

Tad Roberts